import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

/**
 * @Author YuanYuan
 * @Date 2022/7/24
 * @Time 20:21
 */
public class TestDemo {
    public static void main(String[] args) {
        Set<Integer> map = new HashSet<>();
    }
}
